Question

1. What is the difference between mortar and cement? 2. Define the curing process. 3. Define the hydration process. 4. What is the rule of aggregates?

Answer 1

Q.1

Mortar is a paste of cement and sand prepared using the water for the hydration. Sand acts as the main matrix element in mortar.

Cement is rarely used individually, it is used as a binder both in mortar or concrete.

Q.2

Curing is process of periodic application of water to the concrete or mortar walls or surfaces from the time they are placed on site. It is nedded for the hydration of the mix and thereby let the chemical reactions happen in cement so as to strengthen the concrete. Water is very necessary for the hydration of the cement so as to reach the ultimate strength.

Q.3

Hydration of the cement involves a chemical reaction which helps the cement act as a binder and gain the strength and a solid form.

Q.4

Aggregates occupy the maximum space in concrete and therefor they must bear the applied stresses (crushing, compacting and abrasion) effectively. They form the main matrix of the mix.